#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using std::cout;
using std::endl;
using std::cin;

void A(int a = 0)
{
	cout << "a" << a << endl;
}

void B(double a = 1.23)
{
	cout << "a" << a << endl;
}

void C(int i = 0)
{
	cout << "x = ? :" << endl;
	cin >> i;
	if (i > 1)
	{
		for (int j = 0; j < i; j++)
		{
			cout << "Hello C++ j = " << j << endl;
		}
	}

	else
	{
		cout << "Hello" << endl;
	}
}

int main()
{
	A();
	A(2);

	return 0;
}
